Expansion socket or plug.



OSCAR E. lDIEtOEGlfll., OF POMPTQN LAKES, NEW JERSEY,

AND GEORGE A. ROBINSON, OF

NEW YORK, N. Y.

EXPANSION SOCKET R PLUG.

ySpecification of Letters Patent.

Patented Mar. 4, 1919.

Application led October 29, 1918. Serial No. 260,189.

To all whom t may concern:

I Be it known that we, OSCAR E. DROEGE, a

citizen'of the United States," and a resident of Pompton Lakes, in the county of Passaic vt', and State, of New Jersey, and GEORGE A.

a new and 4improved expanslon socket -or .plug for securely anchoring screws or bolts in place in holes drilled .or otherwise pro- -duced in the wall of a building or other structure. Another obj ect is to prevent the socket or plug from shifting or passingvtoo far into or entirely through the hole in the wall or other structure. Another object is to provide a socket or plug of exceedingly Fig.3 is a longitudinal centralsection of simple construction and.- one that can be readily placed in position without the aid of skilled labor".

With these and other objects in view, the invention'consists of certain novel features of construction, as hereinafter lshown and described and then specifically pointed out in the claim.

A practical embodiment of' the invention is represented `1n the accompanying 'drawings forming a part ofv this specification, in

which similar characters of reference indicate corresponding parts in all the views.

Figure lis a perspective view of the body of the improved socket or plug;

- Fig.' 2 is a rear end elevation of the same lthe same on theline 3-73 of Fig. 2; and

Fig, 4 is alongitudinal central section of the socket or plug anchored in place in a hole in a wall. I

The body 10 of the expansion socket or plug is preferably made cylindrical and of a soft material such as lead, and the said body 10 is preferably made in two longitudinal sections 11 and 12 forming between them a central -conical bore 13, the front portion 14 of which is threaded as indicated 1n Fig. 3. A screw or bolt 15 screws in the threaded portion 14: and in advancing inthe bore 13 it cuts its own thread in the material of the body sections 11 and 12 and expands the said sections aga-inst the wall of the hole 16 of a diameter slightly in excess of that of the body 10.

-The outer ends of the body 'sections 11 and l2 are provided with semicircular flanges 20, 2 1 inclosed in a cap-22 having a back flange 23 spun or otherwise formed around the flanges 2O and 21 so as to hold the sections 11 and'12 together and thereby pre- -vent such sections from becoming lost. rl`he cap 22 is provided with a central opening 24 in register with the bore 13 for the passage ofthe screw or bolt 15 tobe anchored in place by the socket, as above described.

, It will be noticed that bythe arrangement described the body 10 can be readily finserted in a hole 16 in the wall, and thenzthe operator can readily screw the bolt or screw 15 in position to expand the sections 11 and 12 against the wall of the hole 16. It will further be noticed that by the arrangement described, the flanges 20 and 21 and the cap 22 prevent the body from passing too far into the lhole 16 especially as the, ange 23 of the cap 22 abuts against the face of the wall or otherstructure on which the expansion socket or plug is used. It is understood that the part to be fastened in place can beclamped either between the face of the wall andthe cap 22-or between the cap and the head of the screw or bolt 15.

The socket Jr plug shown and described is very simple in constructionv and one that can be readil -placed in position without the aid of skille labor.

HavingI .thus described our invention, we

claim as new and desire to secure by Letters An expansion socket or plug, comprising ay body made of soft material approxlmately of cylindrical shape, the body'being formed 

